Answer:
1. During his arrest, General Butler was subjected to harsh conditions, including being locked up in a dark cell, having no access to fresh air or light, and being denied proper food and medical attention. He also suffered from extreme heat and unsanitary conditions, which led to his falling ill.
2. The armed guard encouraged the man to escape to the train because he believed that the man was innocent and had been wrongly accused of a crime. He sympathized with the man's situation and knew that if he was taken to the authorities, he would not receive a fair trial.
3. Hoboes left signs to communicate with other hoboes who were traveling along the same route. These signs provided information about the safety of the area, such as whether it was a good place to find food, shelter, or work, or if there were police or hostile people in the area. The signs were a way for hoboes to share information and to protect themselves from danger while traveling.